avastbrowser.exe

Avast Secure Browser

Application ProcessSafeWeb Browser

CPU Usage

5-25%

Memory

100-500 MB

Location

C:\Program Files (x86)\AVAST Software\Avast Browser\Application

Publisher

AVAST Software

Quick Answer

avastbrowser.exe is safe. Avast Secure Browser uses multiple processes for tabs, extensions, and background tasks to improve security and stability.

Is it a Virus?

✔ NO - Safe

Must be in C:\Program Files (x86)\AVAST Software\Avast Browser\Application or C:\Program Files\AVAST Software\Avast Browser\Application

Warning

Many processes normal

Each tab + extension = separate process

Can I Disable?

✔ YES

Close individual tabs to reduce usage; you can disable startup/background running

What is avastbrowser.exe?

avastbrowser.exe is the executable for Avast Secure Browser, a Chromium-based web browser developed by AVAST Software. It includes built-in privacy features, a VPN option, and safety tools designed to block trackers and malicious sites. The process runs multiple instances for tabs, extensions, and background tasks.

This multi-process architecture isolates tabs, extensions, and plugins to improve security and stability. The browser uses separate Browser, Renderer, GPU, and Extension processes that communicate via IPC, with sandboxing to limit access and contain crashes.

Quick Fact: Avast Secure Browser pioneered multi-process isolation for tabs and extensions, helping prevent crashes and leakage between sites.

Types of Avast Browser Processes

Browser Process: Main Avast Browser window and user interface (1 instance)
Renderer Process: Each tab and iframe (multiple instances)
GPU Process: Hardware acceleration and graphics rendering
Extension Process: Each Avast extension gets its own process
Plugin Process: For plugins like PDF viewer
Utility Process: Background tasks and network services

Is avastbrowser.exe Safe?

Yes, avastbrowser.exe is safe when it's the legitimate file from AVAST Software downloaded from official sources (avast.com or pre-installed by manufacturer).

Is avastbrowser.exe a Virus or Malware?

The real avastbrowser.exe is NOT a virus. However, malware sometimes disguises itself using similar names to trick users.

How to Tell if avastbrowser.exe is Legitimate or Malware

File Location:: Must be in C:\Program Files (x86)\AVAST Software\Avast Browser\Application\avastbrowser.exe or C:\Program Files\AVAST Software\Avast Browser\Application\avastbrowser.exe. Any avastbrowser.exe elsewhere is suspicious.
Digital Signature:: Right-click the file in File Explorer → Properties → Digital Signatures. Should show signer "AVAST Software s.r.o." or similar.
Resource Usage:: Normal usage is 5-25% CPU per tab, 100-500 MB total memory. Extremely high usage when the browser is closed is suspicious.
Behavior:: Avast Browser should only run when you open the browser. Multiple instances when the browser is closed indicates malware.

Red Flags: If avastbrowser.exe is located in unusual folders (like Temp, AppData\Local, or System32), runs when Avast Browser isn't open, has no digital signature, or uses excessive resources constantly, scan your system with Avast or another antivirus immediately. Be wary of similarly-named files like 'avastbrowser64.exe' from untrusted sources.

Why Is avastbrowser.exe Running on My PC?

avastbrowser.exe runs when you open Avast Secure Browser or when Avast Browser is configured to run in the background.

Reasons it's running:

Active Browser Use: You're actively browsing with Avast Secure Browser; each tab creates a separate process.
Background Extensions and Web Apps: Extensions or web apps set to run in the background can keep processes alive.
Startup and Background Tasks: Browser configured to launch on Windows startup or to stay resident for faster startup.
VPN and Security Features: Integrated VPN, anti-tracking, or security checks may run in the background.
Sync and Data Backup: Syncing bookmarks, passwords, and preferences with Avast/Google accounts may spawn processes.

Can I Disable or Remove avastbrowser.exe?

Yes, you can disable avastbrowser.exe. It's safe to close Avast Secure Browser when not in use, and you can uninstall it completely if you prefer a different browser.

How to Stop avastbrowser.exe

End Individual Tabs: Press Shift+Esc in Avast Secure Browser to open its Task Manager, then end specific tabs or extensions
Close Browser: Click the X button or use Ctrl+Shift+W to close all Avast Browser windows
End All Processes: Open Windows Task Manager (Ctrl+Shift+Esc), find avastbrowser.exe, right-click → End Task
Prevent Startup: Task Manager → Startup tab → Disable Avast Secure Browser
Stop Background Apps: Avast Browser Settings → System → Disable 'Continue running background apps when Avast Browser is closed'

How to Uninstall Avast Secure Browser

✔ Windows Settings → Apps → Apps & Features → Avast Secure Browser → Uninstall
✔ Control Panel → Programs → Uninstall a program → Avast Secure Browser → Uninstall
✔ Consider using another browser like Microsoft Edge, Firefox, Opera, or Brave

Common Problems: High CPU or Memory Usage

If avastbrowser.exe is consuming excessive resources:

Common Causes & Solutions

Too Many Tabs Open: Each tab uses 100-300+ MB. Close unused tabs or use tab management extensions.
Resource-Heavy Extensions: Extensions run in background. Go to Avast Browser → Extensions and disable unnecessary ones.
Background Security Scans: Privacy and security features may run checks in background. Adjust in Settings → Privacy & Security.
Malicious Extensions: Some extensions may contain malware. Remove suspicious extensions immediately.
Outdated Avast Secure Browser: Update to the latest version: Settings → Help → About Avast Secure Browser
Hardware Acceleration Issues: Disable: Settings → System → Use hardware acceleration when available

Quick Fixes:
1. Quick Fixes:
2. 1. Press Shift+Esc to open Avast Browser Task Manager and identify high-usage tabs/extensions
3. Clear browsing data: Ctrl+Shift+Delete (Cached images and files)
4. Disable unnecessary extensions in Avast Browser → Extensions
5. Update Avast Secure Browser: Settings → About
6. Enable Memory Saver: Settings → Performance → Memory Saver

Frequently Asked Questions

Is avastbrowser.exe a virus?

No, the legitimate avastbrowser.exe from AVAST Software is not a virus. Verify the file path is in C:\Program Files (x86)\AVAST Software\Avast Browser\Application\avastbrowser.exe or C:\Program Files\AVAST Software\Avast Browser\Application\avastbrowser.exe and that the digital signature comes from AVAST Software s.r.o..

Why is avastbrowser.exe using so much CPU?

High CPU is usually caused by specific tabs running heavy scripts, auto-playing media, extensions, or background security checks. Use Avast Browser Task Manager (Shift+Esc) to identify culprits, disable or update them, and consider reducing open tabs.

Can I delete avastbrowser.exe?

Yes, you can uninstall Avast Secure Browser via Windows Settings → Apps → Avast Secure Browser → Uninstall. Your data may be preserved if you sync with Avast/Google accounts; otherwise, data is removed with uninstall.

Can I disable avastbrowser.exe?

Yes, you can close Avast Secure Browser or disable startup in Task Manager → Startup. To stop background activity, adjust Settings → System to disable background processes.

Why is Avast Secure Browser running at startup?

Avast Secure Browser can be configured to start with Windows. Disable it in Task Manager → Startup to prevent automatic startup.

Why are there so many avastbrowser.exe processes?

Avast Secure Browser uses a multi-process architecture: each tab, extension, and plugin may run in its own process for security and stability.

How do I reduce Avast Browser's memory usage?

Close unused tabs, disable unnecessary extensions in Avast Browser → Extensions, clear cache, and enable Memory Saver in Settings → Performance.